BENDIX SD-08-2433 User Manual download pdf (Page 7)

COMPRESSOR

DESICCANT

BED

DELIVERY

CHECK

VALVE

PURGE

VALVE

TURBO

CUT-OFF

VALVE

(CLOSED)

CONTROL

PORT

SUPPLY

PORT

FRONT

RESERVOIR

SAFETY

VALVE

REAR

RESERVOIR

PURGE

ORIFICE

OIL

COALESCING

FILTER

CONTROL

LINE

PURGE AIR

EXTENDED

PURGE

PORT

EXHAUST

DELIVERY

PORT

FIGURE 5 - BENDIX

AD-9si

™

AIR DRYER WITHOUT GOVERNOR—PURGE CYCLE

TURBO CUT-OFF FEATURE (Refer to Figures 3

and 5)

The primary function of the turbo cut-off valve is to prevent

loss of engine turbocharger air pressure through the

Bendix

AD-9si

™

air dryer when the dryer is in the purge

mode.

At the onset of the purge cycle, the downward travel of the

purge piston is stopped when the turbo cut-off valve (the

tapered portion of the purge piston) contacts its mating

metal seat in the purge valve housing. With the turbo cut-off

valve seated (in the closed position), air in the compressor

discharge line — as well as the AD-9si air dryer inlet port

— cannot enter the air dryer. By completing these actions,

the turbo cut-off effectively maintains turbocharger boost

pressure to the engine.

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BENDIX SD-08-2433 User Manual Page 7

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